Load libraries
library(leaflet)
library(tidyr)
library(dplyr)##
## Attaching package: 'dplyr'## The following objects are masked from 'package:stats':
##
## filter, lag## The following objects are masked from 'package:base':
##
## intersect, setdiff, setequal, unionRead 2017 Car crash data in Allegheny County.
DF<-read.csv("CarCrash2017.csv")Subset the location of the car crash Keep the month of the crash Create a new column with the months names instead of a number Since there is a large number of the crash There will be an option to show car crash per specific month For informaition to present in popup : AUTOMOBILE_COUNT - the number of cars involved DRINKING_DRIVER - Alcohol involved ? FATAL_COUNT - Total number of death ILLEGAL_DRUG_RELATED - Ilegal drug involvment
dfCrash<-select(DF,DEC_LAT,DEC_LONG,CRASH_MONTH,AUTOMOBILE_COUNT,DRINKING_DRIVER,FATAL_COUNT,ILLEGAL_DRUG_RELATED)
colnames(dfCrash)<-c("latitude","longitude","Month Crash","No.Cars.Involved","Driniking.Driver","Death.Count","Drug.Involved")
dfCrash<-dfCrash %>% drop_na()
dfCrash<-mutate(dfCrash,Month.Crash.Name=month.name[dfCrash$`Month Crash`])Use a PNG file as an icon for markers on the MAP
CarsIcon <- makeIcon("CarsIcon1.png",iconWidth = 45, iconHeight = 45)Helper function to add markers
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# Add_Marker --- Helper function #
#Paramters :
#my_map - leaflet object - markeers will be added to this object
#lat_ln_data - Data frame with the lat and long (of the required markers
#groupname - The group name of the markers
#popup - Popup content
#IconMarker - The icon of the marker
Add_Marker <- function(my_map,lat_ln_data,groupname,content,iconMarker=CarsIcon) {
addMarkers(my_map,data=lat_ln_data,clusterOptions = markerClusterOptions(),group =groupname,icon = iconMarker,popup = paste("Car involved:", content ))
#addPopups(my_map, lat_ln_data$latitude,lat_ln_data$longitude,content)
}